Recent questions tagged C#

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c# - I need to convert an XML string into an XmlElement

I'm looking for the simplest way to convert a string containing valid XML into an XmlElement object in C#. How ... <name>wrench</name></item> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Automatic Properties and Structures Don't Mix?

Kicking around some small structures while answering this post, I came across the following unexpectedly: The following ... about this... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

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c# - Get filenames without path of a specific directory

How can I get all filenames of a directory (and its subdirectorys) without the full path? Directory.GetFiles(...) returns always the full path! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Subtract a generic list from another

I am trying remove a list of firmIDs from one list from another. I don't really understand linq but I am ... firms. I hope this makes sense. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Best practice to check if DataRow contains a certain column

At the moment, when I iterate over the DataRow instances, I do this. foreach(DataRow row in table) return ... will look dreadfully unreadable... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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643 views

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c# - How to use HashSet<string>.Contains() method in case -insensitive mode?

How to use HashSet<string>.Contains() method in case -insensitive mode? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How can I make my string property nullable?

I want to make the Middle Name of person optional. I have been using C#.net code first approach. For integer data ... CMName { get; set; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why is accessing an element of a dictionary by key O(1) even though the hash function may not be O(1)?

I see how you can access your collection by key. However, the hash function itself has a lot of operations ... . Can this be explained? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Multiple added entities may have the same primary key

Here is my model of 3 entities: Route, Location and LocationInRoute. the following method fails and get ... does this exception means? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why does appending to TextBox.Text during a loop take up more memory with each iteration?

Short Question I have a loop that runs 180,000 times. At the end of each iteration it is supposed to ... a TextBox.Text for future projects. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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c# - How to get query string parameter from MVC Razor markup?

I want to check the URL parameter in my Razor markup. For example, how do I do something like this: <div ... PARAMETER EQUALS 1) iframe-page}"> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Visual Studio: Multiple post-build commands?

Visual Studio 2008 lets me declare a command and attach it to the post-build event for a project. Like a ... Thanks in advance for your help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to get rid of Naming rule violation messages in Visual Studio?

I just installed Visual Studio 2017. When I open an existing website, I get all sorts of warning messages ... of warnings under Visual Studio? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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496 views

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c# - Moq, SetupGet, Mocking a property

I'm trying to mock a class, called UserInputEntity, which contains a property called ColumnNames: (it does ... help would be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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180 views

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c# - How to compare types

Quick question: how to compare a Type type (pun not intended) with another type in C#? I mean, I've a Type ... .String) doesn't work. Any clue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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210 views

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c# - Nullable ToString()

I see everywhere constructions like: int? myVar = null; string test = myVar.HasValue ? myVar.Value.ToString() : ... or am I missing something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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771 views

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c# - Check if Key Exists in NameValueCollection

Is there a quick and simple way to check if a key exists in a NameValueCollection without looping through it? ... help scratch my brain itch. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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c# - Is there a more elegant way of adding an item to a Dictionary<> safely?

I need to add key/object pairs to a dictionary, but I of course need to first check if the key already exists otherwise ... ] = view; } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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111 views

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c# - creating a database query METHOD

I'm not sure if im delluded but what I would like to do is create a method that will return the ... ; return myCommand.ExecuteNonQuery(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - RESTful WCF service image upload problem

1 namespace Uploader 2 { 3 using System; 4 using System.IO; 5 using System.ServiceModel; 6 using System. ... (see Blog Post) Thanks J See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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298 views

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c# - Communicating with an HTTP Proxy via a .NET TcpClient

How can I communicate through an HTTP proxy with TcpClient in C#, kind of like WebProxy when using HttpWebResponse? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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176 views

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c# - Accounting Database - storing a transaction

You make a gaming website where the user can buy gaming credits and the funds are deposited/credited into the user ... and replaced with a sign. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

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c# - WPF Data Binding - Example of "Custom Type Descriptor"

I see several people saying that WPF can use "Custom Type Descriptors" for "Change notification". The ways I ... via Custom Type Descriptors.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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174 views

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c# - How to get custom annotation attributes for a controller action in ASP.NET MVC 4?

I am working with a permission based authorization system for my app in ASP.NET MVC. For this I have ... Thanks in advance for the solutions See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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245 views

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c# - how to create expression tree / lambda for a deep property from a string

Given a string: "Person.Address.Postcode" I want to be able to get/set this postcode property on an instance of ... Postcode { get; set; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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c# - How To Create Generic Data Access Object (DAO) CRUD Methods with LINQ to SQL

I am new to LINQ to SQL and attempting to create a generic Data Access Object (DAO) for the basic Create, ... Thanks in advance for the replies. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

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c# - uploading image asp.net Core

i am new to ASP.net COre and i would like to upload a file ( an image) and store it in a secific Folder. ... the name of the image thank you :D See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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384 views

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c# - Using an RSA Public Key to decrypt a string that was encrypted using RSA Private Key

I know the main answer I am likely to get is why the hell would you want to do that?! Unfortunately despite my ... Strings to be used with .Net. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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